1 ; RUN: opt -inline -instcombine -S < %s 2 ; PR12967 3 4 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 5 target triple = "x86_64-apple-macosx10.7.0" 6 7 @d = common global i32 0, align 4 8 @c = common global i32 0, align 4 9 @e = common global i32 0, align 4 10 @f = common global i32 0, align 4 11 @a = common global i32 0, align 4 12 @b = common global i32 0, align 4 13 14 define signext i8 @fn1(i32 %p1) nounwind uwtable readnone ssp { 15 entry: 16 %shr = lshr i32 1, %p1 17 %conv = trunc i32 %shr to i8 18 ret i8 %conv 19 } 20 21 define void @fn4() nounwind uwtable ssp { 22 entry: 23 %0 = load i32, i32* @d, align 4 24 %cmp = icmp eq i32 %0, 0 25 %conv = zext i1 %cmp to i32 26 store i32 %conv, i32* @c, align 4 27 tail call void @fn3(i32 %conv) nounwind 28 ret void 29 } 30 31 define void @fn3(i32 %p1) nounwind uwtable ssp { 32 entry: 33 %and = and i32 %p1, 8 34 store i32 %and, i32* @e, align 4 35 %sub = add nsw i32 %and, -1 36 store i32 %sub, i32* @f, align 4 37 %0 = load i32, i32* @a, align 4 38 %tobool = icmp eq i32 %0, 0 39 br i1 %tobool, label %if.else, label %if.then 40 41 if.then: ; preds = %entry 42 %1 = load i32, i32* @b, align 4 43 %.lobit = lshr i32 %1, 31 44 %2 = trunc i32 %.lobit to i8 45 %.not = xor i8 %2, 1 46 br label %if.end 47 48 if.else: ; preds = %entry 49 %call = tail call signext i8 @fn1(i32 %sub) nounwind 50 br label %if.end 51 52 if.end: ; preds = %if.else, %if.then 53 %storemerge.in = phi i8 [ %call, %if.else ], [ %.not, %if.then ] 54 %storemerge = sext i8 %storemerge.in to i32 55 store i32 %storemerge, i32* @b, align 4 56 ret void 57 } 58
